thought there was a chance of seeing it in Ruth Forsythe's book - but no joy - maybe French or English. Sorry this isn't much help. Notice the bulb looks almost new - do you think this has been replaced? Is there any wear on the bottom of the glass? - and does the condition of the metalwork look as tho it is pre war, or much more recent?

Hi Paul...thanks for your reply. The metal work is not new and looks original to me. It has tiny little rust spots on it and looks like chrome. I have unscrewed the top part to reveal a metal dabber and a tiny, well worn, felt pad that cushions the two metal parts. I have looked at the base with a jewellers loop and there is wear but the ridges have obviously protected it well over the years. In my opinion, this is not a modern piece. It glows under a UV back light. Hope this helps!